论文标题
通过激子介导的自旋相互作用的莫伊尔载体旋转螺旋的动态生成
Dynamic generation of spin spirals of moiré trapped carriers via exciton mediated spin interactions
论文作者
论文摘要
堆叠过渡金属二分法（TMD）以形成Moiré超级晶格，为探索Moiré捕获的载体的多体相关现象提供了令人兴奋的机会。另一方面，TMDS双层均具有长寿命的层中激子（IX），这是一种可以在光学上或电气注射的长自旋valley寿命的基本激发。在这里，我们发现，通过移动IX和载体之间的库仑交换，IX浴可以介导Heisenberg和Dzyaloshinskii-Moriya型摩尔式捕获载体之间的旋转相互作用，分别由Ixpiton密度和exciton旋转电流控制。我们显示了强烈的海森堡相互作用，并且在这里可以在多种填充因子处共同建立强大的旋转螺旋磁体，并在这里共同建立强大的自旋螺旋磁序，并在各种填充因子上与螺旋方向共同建立强大的自旋螺旋磁序，并由激发量电流控制。
Stacking transition metal dichalcogenides (TMDs) to form moiré superlattices has provided exciting opportunities to explore many-body correlation phenomena of the moiré trapped carriers. TMDs bilayers, on the other hand, host long-lived interlayer exciton (IX), an elementary excitation of long spin-valley lifetime that can be optically or electrically injected. Here we find that, through the Coulomb exchange between mobile IXs and carriers, the IX bath can mediate both Heisenberg and Dzyaloshinskii-Moriya type spin interactions between moiré trapped carriers, controllable by exciton density and exciton spin current respectively. We show the strong Heisenberg interaction, and the extraordinarily long-ranged Dzyaloshinskii-Moriya interaction here can jointly establish robust spin spiral magnetic orders in Mott-Wigner crystal states at various filling factors, with spiral direction controlled by exciton current.
